Update app.py

app.py

@@ -92,7 +92,7 @@ def from_gpt(query: str, plot: bool):
         chains = [db_chain, json_chain] if plot else [db_chain]
         main_chain = SimpleSequentialChain(chains=chains, verbose=True)
         ans = main_chain.run(query)
-    except Exception e:
+    except Exception as e:
         return "Sorry, I didn't get that" 
 
     # Save data as json if plot